Datasets

This is an integrated and comparative study of two California rifts. The available data make a comparative and integrated analysis worthwhile. Receiver functions, controlled source seismic, gravity, and magnetic data has been used to constrain crustal structure.

The terrain corrected United States gravity database is available through the link below. The terrain corrections were calculated by Mike Webring of the U. S. Geological Survey using a digital elevation model and a technique based on the approach of Donald Plouff. The reduction of these data has been updated with modern geodetic datums and a higher precision digital elevation model. In the present version, latitude and longitude values are referenced to NAD83 (North American Datum 83; horizontal datum) and elevation values in meter are referenced to NGVD88 (Vertical datum).

A cooperative effort between Canada, the U.S. and Mexico has produced a very nice magnetic map and database for North America. The main goal of our effort is to simply make these data available in a more convenient form.

On May 16-18, 2003, the geophysics group at the University of Texas at El Paso conducted a wide-angle seismic refraction/reflection experiment across a portion of the southern Rio Grande Rift centered on the Potrillo Volcanic Field (PVF). The PVF is perhaps best known for its xenolith localities at two maar volcanoes within the field, Kilbourne Hole and Potrillo Maar.